Improvement in steam-boilers



UNITED STATES PATENT OFFICE.

MATTHEW SMITH, OF PITTSBURG, PENN SYLVANIA.

IMPROVEMENT IN STEAM-BOILERS.

Specification forming part of Letters Patent No. 34,275, dated January28, 1862.

.To @ZZ whom it may concern.-

Be it known that I, MATTHEW SMITH, ofthe city of Pittsburg, in thecounty of Allegheny and State of Pennsylvania, have invented a new anduseful Improvement in Steam-Boilers; and I do hereby declare that thefollowing is a full, clear, and eXact description thereof, referencebeing had to the accompanying drawings, which form part of thisspecification, and to the letters of reference marked thereon.

The nature ot my invention consists in placing within the water-body ofa cylindrical boiler one or more large water-tight semi-cylindrical orother shaped steam-receivers, so arranged in relation to the bottom ofthe boiler as that the greater portion of the space usually occupied bythe water shall be taken up by the receiver, allowing only athin sheetof water between the receiver and the lower portion of the boiler,extending up to the regular water-line, by which arrangement onlyonethird of the water generally used in cylinder-boilers is necessary,and this being kept in direct contact with the hottest portion of theshell is quickly heated and steam more rapidly generated than could beby any other means with a cylinder-boiler. The receiver in my boiler Ihave constructed semi-cylindrical, as being best adapted to the shape.From the top of the receiver I have carried a pipe high enough to keepthe water out and yet sufficiently below the top of the boiler to admitof a full opening for the admission of the steam as fast as generated.

Another portion of my invention consists in supporting and keeping thereceiver in its proper position by trunnions formed upon its ends andresting in bearings in the heads of the boiler. This arrangement admitsof the receiver being rotated when found necessary to clean out theaccumulation of mud, and for other purposes.

Attached to the lower port-ion of the receiver is a cock extendingthrough the head of the boiler, for the purpose of blowing off suchwater as may accumulate in the receiver by condensation or otherwise.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation by reference to theaccompanying drawings, in

which- Figure l represents a longitudinal vertical section of myimprovement. The part marked letter A indicates the boiler, which may beconstructed in any of the known forms of cylindrical boilers; but inor'der to obviate the necessity of carrying so much water and at thesame time creating a greater space for the steam, I have applied thereina large steamreceiver. (Represented by letter B.) This receiver can beconstructed of any shape to suit the boiler wherein it is intended to beplaced. The receiver is to be made perfectly water-tight, having anopening for the admission of steam only at the top of the pipe C,connected with the receiver near its middle. This is sufficiently highto prevent the water from getting in and large enough to allow the steamto pass and repass with freedom. The receiver is supported or swung upontrunnions (marked D) attached to the heads ofthe receiver by bolts orotherwise. These rest in bearings in the center of the heads of theboiler. (Marked F.) This enables the receiver to be turned or swungaround to admit of cleaning the boiler, the receiver hanging so low asto produce but a thin sheet of water between the boiler and receiver,requiring but a small amount of fuel to get up steam. At the lowestpoint of the receiver at its front end is a blow-off cock E. Thisextends through the front head of the boiler and allows of any waterthat may. accumulate in the receiver by condensation or otherwise to beblown out. The heads of the boiler can be so constructed with largeman-holes as to admit of their being taken off for the double purpose ofcleansing and repairing the boiler or receiver, and also for taking thereceiver out, if found necessary to do so.

Fig. 2 represents a transverse vertical section of the boiler andreceiver, letter K showing the water-line.

Fig. 3 represents a perspective view of the receiver.

All the letters on the different figures indicate like parts.

Having thus described my invention, whatl claim is-e l. Combining withthe interior of a cylin- The combination of a bloW-of valve or oook witha steam-receiver, in a. cylindrical boiler, passing through Ithe boilerand oommunieziting only with the interior of the receiver, for thepurpose as hereinbefore stated.

MATTHEW SMITH. Witnesses:

J. W. ELLS, JAS. HARRISON.

